1. The wind tunnel replaced the whirling arm because the whirling arm had (among others) this problem.
Whirling arms created too much turbulence. Whirling arms were too expensive. Whirling arms were illegal in the United States. Whirling arms tended to spontaneously burst into flames.
Whirling arms created too much turbulence.
Whirling arms were too expensive.
Whirling arms were illegal in the United States.
Whirling arms tended to spontaneously burst into flames.
2. Which of the following is a part of a wind tunnel?
Convection cone Dive section Settling chamber The islets of Langerhans
Convection cone
Dive section
Settling chamber
The islets of Langerhans
3. The following is often used in conjunction with a wire mesh screen to produce a smooth, straight airflow in the wind tunnel.
Tupelo Honey flow straightener Honeycomb flow straightener Honeybee flow straightener Honey bear flow straightener
Tupelo Honey flow straightener
Honeycomb flow straightener
Honeybee flow straightener
Honey bear flow straightener
4. When the cross-sectional area (the contraction cone) of a wind tunnel decreases, the velocity of the airflow at that point does which of the following?
Increases Decreases Stops Reverses
Increases
Decreases
Stops
Reverses
5. The main forces to be measured in the test section are:
Lift and drag Push and pull Roll and yaw Sturm und Drang
Lift and drag
Push and pull
Roll and yaw
Sturm und Drang
6. This common device is often used to provide the force that moves the air through a wind tunnel.
Lawn mower Fan Blender Dryer
Lawn mower
Fan
Blender
Dryer
7. In a closed-loop wind tunnel, the following is true:
The intake and exhaust ends of the tunnel are open. The intake and exhaust ends of the tunnel are connected. The direction of the airflow is reversible. Every even integer greater than two is expressible as the sum of two prime numbers.
The intake and exhaust ends of the tunnel are open.
The intake and exhaust ends of the tunnel are connected.
The direction of the airflow is reversible.
Every even integer greater than two is expressible as the sum of two prime numbers.
8. The Java Virtual Wind Tunnel, like all computer-simulated wind tunnels, uses CFD methods to simulate the flow of air over an object. CFD stands for which of the following?
Computer-facilitated design Computed flow description Computational fluid dynamics Completely fictional depiction
Computer-facilitated design
Computed flow description
Computational fluid dynamics
Completely fictional depiction
9. Where is the world's largest wind tunnel?
NASA's Ames Research Center in California NASA's Lewis Research Center in Ohio NASA's Langley Research Center in Virginia Fred Smimlertz's basement in New York
NASA's Ames Research Center in California
NASA's Lewis Research Center in Ohio
NASA's Langley Research Center in Virginia
Fred Smimlertz's basement in New York
10. Almost every modern aircraft design is tested in one of these prior to full-size fabrication.
Dynamic pressure stress analyzer Wind tunnel Whirling arm Toaster oven
Dynamic pressure stress analyzer
Wind tunnel
Whirling arm
Toaster oven